The child found some unfamiliar pictures on it and asked his
older brother to delete them.

"He said that he didn't take these pictures so I went over to
these pictures and I see two people in a bed. I told my dad and I
said dad this has porn on it and he got up and went right to the
phone," the older brother told 9 News.

There were nine pornographic images that the boys saw in the 3DS'
library, the family said. Now, the family is mad about it,
claiming that the younger child is "traumatized."

How did GameStop allow a porn-filled 3DS to be sold? Here's the
explanation it gave to 9 News:

"GameStop is currently researching this situation. We have a
rigorous quality control process in place to ensure that existing
content is removed from all devices before they are re-sold. Out
of millions of transactions each year, ones like this happen very
rarely. Our number one priority is to make this right for our
customer."